Linux kernel SNMP NAT helper snmp_trap_decode() denial of service

linux-snmp-nathelper-dos (26594) The risk level is classified as LowLow Risk

Description:

The Linux kernel SNMP NAT helper could allow a remote attacker to cause a denial of service caused by a memory corruption vulnerability in the snmp_trap_decode() function. If the ip_nat_snmp_basic module is loaded and traffic is being NATed on port 161 or 162, a remote attacker could exploit this vulnerability to cause the system to crash.


Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of Linux kernel (2.6.16.18 or later), available from The Linux Kernel Archives Web site. See References.

For Red Hat Linux:
Refer to RHSA-2006:0437-22 and RHSA-2006:0580-7 for patch, upgrade, or suggested workaround information. See References.

For Red Hat Linux 4:
Refer to RHSA-2006:0617-15 for patch, upgrade, or suggested workaround information. See References.

For Debian GNU/Linux:
Refer to DSA-1183-1 or DSA-1184-1 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux:
Refer to SUSE-SA:2006:047 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux:
Refer to SUSE-SA:2006:064 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Apply the appropriate update for your system. See References.

References:

  • IBM Systems Support Web site: Support for HMC.
  • The Linux Kernel Archives Web site: ChangeLog-2.6.16.18.
  • The Linux Kernel Archives Web site: The Linux Kernel Archives.
  • ASA-2006-143: kernel security update (RHSA-2006-0580)
  • ASA-2006-180: Updated kernel packages for Red Hat Enterprise Linux 3 Update 8 (RHSA-2006-0437)
  • ASA-2006-203: kernel security update (RHSA-2006-0617)
  • BID-18081: Linux Kernel SNMP NAT Helper Remote Denial of Service Vulnerability
  • CVE-2006-2444: The snmp_trap_decode function in the SNMP NAT helper for Linux kernel before 2.6.16.18 allows remote attackers to cause a denial of service (crash) via unspecified remote attack vectors that cause failures in snmp_trap_decode that trigger (1) frees of random memory or (2) frees of previously-freed memory (double-free) by snmp_trap_decode as well as its calling function, as demonstrated via certain test cases of the PROTOS SNMP test suite.
  • DSA-1183: kernel-source-2.4.27 -- several vulnerabilities
  • DSA-1184: kernel-source-2.6.8 -- several vulnerabilities
  • MDKSA-2006:087: Updated kernel packages fixes netfilter SNMP NAT memory corruption
  • OSVDB ID: 25750: Linux Kernel SNMP NAT Helper snmp_trap_decode() Function DoS
  • RHSA-2006-0437: Updated kernel packages for Red Hat Enterprise Linux 3 Update 8
  • RHSA-2006-0580: kernel security update
  • RHSA-2006-0617: kernel security update
  • SA20225: Linux Kernel SNMP NAT Helper Denial of Service
  • SA21983: Avaya Products Linux Kernel Multiple Vulnerabilities
  • SA22174: Avaya Products Linux Kernel Multiple Vulnerabilities
  • SECTRACK ID: 1016153: Linux Kernel Netfilter SNMP NAT Memory Bug Lets Remote Users Deny Service
  • SUSE-SA:2006:042: kernel local privilege escalation
  • SUSE-SA:2006:047: kernel security problems
  • SUSE-SA:2006:064: Linux kernel 2.4 security problems
  • US-CERT VU#681569: Linux Kernel may fail to properly handle SNMP packets
  • USN-302-1: Linux kernel vulnerabilities
  • VUPEN/ADV-2006-1916: Linux Kernel snmp_trap_decode() Remote Memory Corruption Vulnerability

Platforms Affected:

  • Canonical Ubuntu 5.04
  • Canonical Ubuntu 5.10
  • Canonical Ubuntu 6.06 LTS
  • Debian Debian Linux 3.1
  • Linux Kernel 2.6.0 test7
  • Linux Kernel 2.6.0 test8
  • Linux Kernel 2.6.0 test9
  • Linux Kernel 2.6.0 test6
  • Linux Kernel 2.6.0 test5
  • Linux Kernel 2.6.0
  • Linux Kernel 2.6.0 test3
  • Linux Kernel 2.6.0 test2
  • Linux Kernel 2.6.0 test11
  • Linux Kernel 2.6.0 test10
  • Linux Kernel 2.6.0 test1
  • Linux Kernel 2.6.0 test4
  • Linux Kernel 2.6.1 rc1
  • Linux Kernel 2.6.1 rc2
  • Linux Kernel 2.6.1 rc3
  • Linux Kernel 2.6.1
  • Linux Kernel 2.6.10 rc2
  • Linux Kernel 2.6.10 rc3
  • Linux Kernel 2.6.10
  • Linux Kernel 2.6.10 rc1
  • Linux Kernel 2.6.11 rc2
  • Linux Kernel 2.6.11 rc3
  • Linux Kernel 2.6.11 rc4
  • Linux Kernel 2.6.11
  • Linux Kernel 2.6.11 rc5
  • Linux Kernel 2.6.11 rc1
  • Linux Kernel 2.6.11.1
  • Linux Kernel 2.6.11.10
  • Linux Kernel 2.6.11.11
  • Linux Kernel 2.6.11.12
  • Linux Kernel 2.6.11.2
  • Linux Kernel 2.6.11.3
  • Linux Kernel 2.6.11.4
  • Linux Kernel 2.6.11.5
  • Linux Kernel 2.6.11.6
  • Linux Kernel 2.6.11.7
  • Linux Kernel 2.6.11.8
  • Linux Kernel 2.6.11.9
  • Linux Kernel 2.6.12 rc6
  • Linux Kernel 2.6.12 rc5
  • Linux Kernel 2.6.12
  • Linux Kernel 2.6.12 rc4
  • Linux Kernel 2.6.12 rc3
  • Linux Kernel 2.6.12 rc2
  • Linux Kernel 2.6.12 rc1
  • Linux Kernel 2.6.12.1
  • Linux Kernel 2.6.12.12
  • Linux Kernel 2.6.12.2
  • Linux Kernel 2.6.12.22
  • Linux Kernel 2.6.12.3
  • Linux Kernel 2.6.12.4
  • Linux Kernel 2.6.12.5
  • Linux Kernel 2.6.12.6
  • Linux Kernel 2.6.13 rc6
  • Linux Kernel 2.6.13 rc7
  • Linux Kernel 2.6.13 rc5
  • Linux Kernel 2.6.13
  • Linux Kernel 2.6.13 rc4
  • Linux Kernel 2.6.13 rc3
  • Linux Kernel 2.6.13 rc2
  • Linux Kernel 2.6.13 rc1
  • Linux Kernel 2.6.13.1
  • Linux Kernel 2.6.13.2
  • Linux Kernel 2.6.13.3
  • Linux Kernel 2.6.13.4
  • Linux Kernel 2.6.13.5
  • Linux Kernel 2.6.14 rc3
  • Linux Kernel 2.6.14 rc1
  • Linux Kernel 2.6.14 rc4
  • Linux Kernel 2.6.14 rc5
  • Linux Kernel 2.6.14
  • Linux Kernel 2.6.14 rc2
  • Linux Kernel 2.6.14.1
  • Linux Kernel 2.6.14.2
  • Linux Kernel 2.6.14.3
  • Linux Kernel 2.6.14.4
  • Linux Kernel 2.6.14.5
  • Linux Kernel 2.6.14.6
  • Linux Kernel 2.6.14.7
  • Linux Kernel 2.6.15
  • Linux Kernel 2.6.15 rc4
  • Linux Kernel 2.6.15 rc5
  • Linux Kernel 2.6.15 rc2
  • Linux Kernel 2.6.15 rc3
  • Linux Kernel 2.6.15 rc1
  • Linux Kernel 2.6.15 rc7
  • Linux Kernel 2.6.15 rc6
  • Linux Kernel 2.6.15.1
  • Linux Kernel 2.6.15.11
  • Linux Kernel 2.6.15.2
  • Linux Kernel 2.6.15.3
  • Linux Kernel 2.6.15.4
  • Linux Kernel 2.6.15.5
  • Linux Kernel 2.6.15.6
  • Linux Kernel 2.6.15.7
  • Linux Kernel 2.6.16
  • Linux Kernel 2.6.16 rc7
  • Linux Kernel 2.6.16 rc3
  • Linux Kernel 2.6.16 rc6
  • Linux Kernel 2.6.16 rc5
  • Linux Kernel 2.6.16 rc4
  • Linux Kernel 2.6.16.1
  • Linux Kernel 2.6.16.10
  • Linux Kernel 2.6.16.11
  • Linux Kernel 2.6.16.12
  • Linux Kernel 2.6.16.13
  • Linux Kernel 2.6.16.14
  • Linux Kernel 2.6.16.15
  • Linux Kernel 2.6.16.16
  • Linux Kernel 2.6.16.17
  • Linux Kernel 2.6.16.18
  • Linux Kernel 2.6.16.2
  • Linux Kernel 2.6.16.3
  • Linux Kernel 2.6.16.4
  • Linux Kernel 2.6.16.5
  • Linux Kernel 2.6.16.6
  • Linux Kernel 2.6.16.7
  • Linux Kernel 2.6.16.8
  • Linux Kernel 2.6.16.9
  • Linux Kernel 2.6.2 rc3
  • Linux Kernel 2.6.2 rc2
  • Linux Kernel 2.6.2 rc1
  • Linux Kernel 2.6.2
  • Linux Kernel 2.6.3 rc1
  • Linux Kernel 2.6.3 rc4
  • Linux Kernel 2.6.3 rc3
  • Linux Kernel 2.6.3 rc2
  • Linux Kernel 2.6.3
  • Linux Kernel 2.6.4
  • Linux Kernel 2.6.4 rc3
  • Linux Kernel 2.6.4 rc2
  • Linux Kernel 2.6.4 rc1
  • Linux Kernel 2.6.5 rc1
  • Linux Kernel 2.6.5
  • Linux Kernel 2.6.5 rc3
  • Linux Kernel 2.6.5 rc2
  • Linux Kernel 2.6.6 rc3
  • Linux Kernel 2.6.6 rc2
  • Linux Kernel 2.6.6
  • Linux Kernel 2.6.6 rc1
  • Linux Kernel 2.6.7
  • Linux Kernel 2.6.7 rc3
  • Linux Kernel 2.6.7 rc2
  • Linux Kernel 2.6.7 rc1
  • Linux Kernel 2.6.8 rc3
  • Linux Kernel 2.6.8 rc2
  • Linux Kernel 2.6.8 rc1
  • Linux Kernel 2.6.8
  • Linux Kernel 2.6.8 rc4
  • Linux Kernel 2.6.8.1
  • Linux Kernel 2.6.9 rc1
  • Linux Kernel 2.6.9 rc3
  • Linux Kernel 2.6.9 rc2
  • Linux Kernel 2.6.9
  • Linux Kernel 2.6.9 rc4
  • MandrakeSoft Mandrake Linux 2006
  • MandrakeSoft Mandrake Linux 2006 X86_64
  • Novell Linux Desktop 9
  • Novell Open Enterprise Server
  • Novell Open Enterprise Server
  • Novell UnitedLinux 1.0
  • RedHat Enterprise Linux 2.1 AS
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 AS
  • RedHat Linux Advanced Workstation 2.1 Itanium
  • SuSE Linux Enterprise Server 8
  • SUSE SuSE Linux 10.1
  • SUSE SuSE Linux 9.1
  • SuSE SuSE Linux Desktop 1.0
  • SuSE SuSE Linux OpenExchange Server 4
  • SuSE SuSE Linux Retail Solution 8
  • SuSE SuSE Linux School Server
  • SuSE SuSE Linux Standard Server 8
  • SuSE SuSE SLES 9
  • Volition Red Faction 1.0

Reported:

May 22, 2006

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